Eye contact is a big part of it. There was a documentary about dogs recently, where they did a simple experiment by placing a piece of food inside a cage that c

Eye contact is a big part of it. There was a documentary about dogs recently, where they did a simple experiment by placing a piece of food inside a cage that could not be opened by anyone but a human. First they let the wolf go at it, and it just went crazy trying to find a way in, inevitably giving up to do something else. The dog on the other hand tried for a bit, and then turn around and looked directly at the human for assistance.